cheap USB-C cable are not good

Using a cheap USB-C cable? It may damage your device

Compared with official accessories, USB-C cables sold in third-party markets are cheaper and attract many consumers to buy them, but do they meet the specifications? Recently, Benson Leung, an engineer of the Google Chromebook Pixel team, said that not every third-party USB-C cable is compatible with his notebook.

Some cheap USB-C cables were tested and found that some of them use cheap 10kΩ resistors, and even more excessively, some even have no resistors at all, and therefore cannot charge their Pixel properly. If the lack of resistors, may lead to an inflow of current beyond the load of the device, and the device can not reduce the current to an acceptable range, which will make the device damaged, or even trigger a greater security risk.

  Generally speaking, when a USB-C cable is connected to a device via a USB 2.0 to USB-C adapter, the cable should provide a 56kΩ pull-up resistor to allow the device to correctly identify the connected charging device as a legacy device, thus regulating the charging current to a 1.5A or 2.4A current that the device can accept.

  It is understood that an important feature of USB-C is the ability to provide a 3A charging current, which is the standard that most cheap USB-C can not reach. Since some traditional devices cannot be adjusted to charge at the proper current on their own, it puts the hardware at great risk if the charging current is not up to par.